EXERGY AND LIFE CYCLE ENVIRONMENTAL ANALYSIS OF MIXED ALCOHOL PRODUCTION SYSTEM VIA PATHWAY OF BIOMASS GASIFICATION, CATALYTIC SYNTHESIS AND TAIL GAS FERMENTATION

Tan Fenghua; Li Yuping; Liao Yuhe; Dong Kaijun; Wu Jinhu; Ma Longlong

doi:10.19912/j.0254-0096.tynxb.2023-0245

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (12) : 366-373. DOI: 10.19912/j.0254-0096.tynxb.2023-0245

EXERGY AND LIFE CYCLE ENVIRONMENTAL ANALYSIS OF MIXED ALCOHOL PRODUCTION SYSTEM VIA PATHWAY OF BIOMASS GASIFICATION, CATALYTIC SYNTHESIS AND TAIL GAS FERMENTATION

Tan Fenghua^1,2, Li Yuping¹, Liao Yuhe¹, Dong Kaijun¹, Wu Jinhu¹, Ma Longlong⁴

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Abstract

A new process for mixed alcohol production via the pathway of gasification of forestry residue（wood chip）, catalytic synthesis and tail gas fermentation was simulated in this study. The mass and energy flow of the system, the exergic efficiency of the system/subsystem and the source of exergic loss were analyzed. Through the collection of resource energy consumption and emission inventories at different stages of forestry, storage and transportation, preparation and product transportation, nine types of environmental impacts, including global warming potential and ozone depletion potential, were analyzed. The results show that the tail gas fermentation subsystem can use microbial strains to metabolize CO and CO₂ in the tail gas to prepare ethanol and can obtain high yield of higher alcohols by catalyzed synthesis. The mixed alcohol yield and exergy efficiency can reach 0.328 kg/kg wood chips and 43.8% respectively. During the life cycle of mixed alcohol, non-carcinogenic damage to human body and terrestrial ecological toxicity are the most affected environmental types, which came from the preparation and storage and transportation stages respectively.

Key words

biomass / mixed alcohol / exergy / environmental impact assessment / gasification synthesis / fermentation

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Tan Fenghua, Li Yuping, Liao Yuhe, Dong Kaijun, Wu Jinhu, Ma Longlong. EXERGY AND LIFE CYCLE ENVIRONMENTAL ANALYSIS OF MIXED ALCOHOL PRODUCTION SYSTEM VIA PATHWAY OF BIOMASS GASIFICATION, CATALYTIC SYNTHESIS AND TAIL GAS FERMENTATION[J]. Acta Energiae Solaris Sinica. 2023, 44(12): 366-373 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0245

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